231897 has 8 divisors (see below), whose sum is σ = 327456. Its totient is φ = 145472.

The previous prime is 231893. The next prime is 231901. The reversal of 231897 is 798132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (231893) and next prime (231901).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231897 - 2² = 231893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2223 + ... + 2324.

It is an arithmetic number, because the mean of its divisors is an integer number (40932).

2²³¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

231897 is a deficient number, since it is larger than the sum of its proper divisors (95559).

231897 is a wasteful number, since it uses less digits than its factorization.

231897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4567.

The product of its digits is 3024, while the sum is 30.

The square root of 231897 is about 481.5568502264. The cubic root of 231897 is about 61.4372418161.

It can be divided in two parts, 2318 and 97, that added together give a triangular number (2415 = T₆₉).

The spelling of 231897 in words is "two hundred thirty-one thousand, eight hundred ninety-seven".